EMLSR Link Switching via Preliminary Configuration Frames
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Solution Overview
Problem
Existing wireless LAN technologies face challenges in efficiently managing multi-link operations, particularly for devices supporting enhanced multi-link single radio (EMLSR) operations, where frame transmission and reception on a single link require time for switching radio chains, leading to communication interruptions and reduced throughput.
Innovation Solution
A method involving a device that receives a data frame on a first link, transmits a reception response frame, and then switches to a second link to receive a subsequent data frame based on configuration information, using multiple spatial streams and aggregated MAC protocol data units, allowing for efficient frame transmission and reception without communication interruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a device supports EMLSR operations and waits for reception on multiple links, then the device can receive frames on multiple links simultaneously, but the device requires time to switch transceivers between links which causes communication interruptions
Solution Approach 1:
The patent applies preliminary action by having the first device transmit a third data frame containing configuration information for the second data frame transmission before actually switching to the second link. This allows the second device to prepare for the upcoming link switch by receiving and processing the configuration information in advance, thereby reducing the actual switching time and minimizing communication interruptions.
Solution Approach 2:
The patent uses an intermediary approach by introducing a third data frame as a mediator between the first data frame reception and the second data frame transmission. This third data frame carries configuration information that coordinates the transition between links, allowing smooth handover and reducing the impact of transceiver switching time on overall communication efficiency.
2Reliability
If frame transmission and reception operation is performed on a single link, then the device can maintain stable connection on that link, but other links cannot perform frame transmission and reception operations simultaneously
Solution Approach 1:
The patent applies segmentation by dividing the frame transmission process into distinct phases on different links. The first data frame is transmitted on the first link using multiple spatial streams, then the device switches to the second link for the second data frame transmission. This segmentation allows each link to be utilized independently and efficiently, improving overall productivity while maintaining reliable connections on each active link.
Solution Approach 2:
The patent implements dynamics by enabling the device to dynamically switch between different links based on the transmission requirements. The device can transition from the first link to the second link when needed, allowing flexible adaptation to varying communication conditions and maximizing link utilization while maintaining connection stability on the actively used link.
3Adaptability or versatility
If the device switches radio chains between links, then the device can operate on different links, but the switching process causes communication interruptions
Solution Approach 1:
The patent applies preliminary action by transmitting the third data frame with configuration information before the actual link switch occurs. This allows the receiving device to prepare for the incoming frame on the new link, reducing the communication interruption time during the radio chain switching process and enabling smoother transitions between links.
Data Source
AI summary
Disclosed are a method and device for an EMLSR operation in a wireless LAN. A method of a first device comprises the steps of: receiving a first data frame from a second device via a first link by using a multi-spatial stream; transmitting a reception response frame to the first data frame to the second device via the first link; transmitting a third data frame, including configuration information for transmitting the second data frame, to the second device via the first link; and transmitting the second data frame to the second device via the second link on the basis of the configuration information.